package com.itcast.reggie.filter;

import com.alibaba.fastjson.JSON;
import com.itcast.reggie.commen.BaseContext;
import com.itcast.reggie.pojo.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.AntPathMatcher;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;


/**
 * @author 检查用户是否登录
 */
//@WebFilter(filterName = "loginCheckFilter", urlPatterns = "/*")
@Slf4j
public class LoginCheckFilter implements Filter{
    public static final AntPathMatcher PATH_MATCHER = new AntPathMatcher();


    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        //获取当前线程的id
        long id = Thread.currentThread().getId();
        log.info("线程id为：{}", id);

        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        String requestURI = request.getRequestURI();
        log.info("拦截到请求：{}", requestURI);
        //定义不需要处理的请求
        String[] Urls = new String[]{
                "/employee/login",
                "/employee/logout",
                "/backend/**",
                "/front/**"
        };
        //判断本次请求是否需要处理
        //true : 不需要处理
        boolean check = check(Urls, requestURI);
       /* boolean check = false;
        for (String url : Urls) {
            if (url.equals(requestURI)) {
                check = true;
                break;
            }
        }*/
        //不需要处理,则放行
        if (check) {
            log.info("本次操作不需要处理", requestURI);
            filterChain.doFilter(request, response);
            return;
        }
        //判断登录状态.登录则放行
        if (request.getSession().getAttribute("employee") != null) {
            log.info("用户已登录，用户id为：{}", request.getSession().getAttribute("employee"));
            //将用户信息存入ThreadLocal
            Long empId = (Long) request.getSession().getAttribute("employee");
            BaseContext.setCurrentId(empId);

            filterChain.doFilter(request, response);
            return;
        }
        log.info("用户未登录");
        //filterChain.doFilter(request, response);
        response.getWriter().write(JSON.toJSONString(R.error("NOTLOGIN")));
        return;
    }

    public boolean check(String[] urls,String requestURI){
        for (String url : urls) {
            boolean match = PATH_MATCHER.match(url, requestURI);
            if(match){
                return true;
            }
        }
        return false;
    }
}


